Electromagnet.



C. T. EVANS.

ELECTROMAGNET.

APPLICATION FILED 0CT.28, I913.

Patented June 13, 1916.

'umrnn s rars ra'rnrrr curios.

CLARENCE '1. EVANS, 0F MILWAUKEE, WISCONSIN, .ASSIGNOR TO THE CUTLER-HAMMER MFG. 60., 0F MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

ELECTROMAGNET.

Specification of Letters Patent. Patented J ne 13, 191$.

Application filed October 28, 1913. Serial No. 797,859.

To all whom it may concern:

Be it known that I, CLARENCE T. EVANS, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented new and.

useful Improvements in Electromagnets, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

My invention relates to improvements in electromagnets and controlling means therefor.

My invention has among its objects to provide a simple, efficient and reliable mag.- net for effecting different operations of one or more operated members upon successive responses.

Magnets embodying my invention may be advantageously employed for various different purposes, as, for example, operating electric switches, and for illustration 1 have shown in the accompanying drawing one embodiment thereof used in such a relation.

The magnet as illustrated comprises a winding 1 mounted on a magnet frame 2. lhe winding has a core 3 projecting from opposite ends thereof, and two oppositely disposed magnetic armatures l and 5. The armatures t and 5 are pivoted respectively at 6 and 7 tothe magnet frame. They are adapted to be attracted toward one another by the magnet and to separate by gravity when the magnet is deenergized. The outward movement of each armature is limited by tail pieces 8 coiiperating with stops 9 provided on the magnet frame.

Latches l0 and 11 pivoted respectively to the armatures i and 5 cooperate with fixed stops 1'12 and 13 respectively to lock said armatures in attracted position. The latches 10 and 11, are, however, provided with intor-engaging cam extremities 1e and 15 res pectively, which function to preventlatching of both armatures at the same time and to insure latching of the armatures alternately upon successive responses of the magnet. More specifically, the latches coact as follows: When either armature is latched in position the cam of its latch projects into the path of the other latch with the result that upon energization of the magnet and attraction of the free armature the latter latch trips the former latch and itself drops into latching position. As shown, the armature 4c is in latched position whereby the cam it of latch 10 extends into the path of the latch 11 of the armature 5. Accordingly it will be observed that when the magnet is energized to attract the armature 5, the entremity of the latch 11 will engage the underside of the cam 1% of latch 10, thereby lifting said latter latch to release the armature 4. Further, it will be observed that under such conditions the latch 11 is free to engage the member 13 and thus latch the armature 5 in attracted position. Thus, upon deenergization of the magnet 1 the armature 4 would move outwardly while the armature 5 would remain in attracted position, and during the outward movement of the armature 4 the latch 10 thereof would disengage the extremity of the latch 11 and drop to a position corresponding to the illustrated position of latch 11. lhe latches would thus assume a relation just the reverse of that illustrated, whereby when a magnet was again energized the latch 10 would tri the latch 11 and itself assume latched position, whereas when the magnet was again dec'n'ergized the armature & would remain in attracted position and the armature 5 would return to the position illustrated.

As shown, the magnet is employed for operating two switch arms 16 and 17 mounted on the armatures i and 5 respectively and cooperating with stationary contacts 18 and 19 respectively; The arrangement is such that each arm engages its respective stationary contact upon attraction of its respective armature and 'disengages the same upon release of its armature. lhus considering the switches individually each would be alternately closed and released upon successive responses of the magnet. On the other hand, considering the same together, they would both be closed upon energization of the magnet and tripped alternately upon successive responses of the magnet. Thus, upon each response of the magnet one switch would close and trip the other. Of course, if desired, the switches might be arranged to make and break contact in other relations.

Referring now to the control means for the magnet, the sameinclude two switches 20 and 21 biased to closed position and adapted to be opened by the ail-matures t and 5 respectively, when attracted by the magnet 1. These switches are of a conventional type and'are adapted to be operated by projections 20? and 21 on the armatures. They are included in two separate energizing circuits for the magnet 1 and by virtue of their arrangement automatically deenergize the magnet upon each response thereof and also necessitate energization of the magnet by closure of said circuits alternately. This will be readily apparent from the circuit arrangement illustrated, which will now be described.

The two energizing circuits are connected to a battery 22 and are controlled by switch 23 cooperating with contacts 24 and 25. As illustrated, the switch 23 is in engagement with contact 25 and thereby tends to complete one of said circuits from the lower terminal of battery 22 by conductor 26, through switch 20, by conductor 27 through magnet 1 and thence by conductor 28 to the opposite terminal of the battery. However, with the switch parts in'the positions illustrated, the switch 20 is held in open position whereby said circuit is opening and the magnet deenergized. Thus switch 23 must be moved into engagementwith con tact 24 to energize said magnet. When so operated the switch 23 completes the second circuit from the lower terminal of the battery by. conductor 29, through switch 21, conductors 30 and 27 through the magnet 1 and thence by conductor 28 to battery 22. This energizes the magnet, causing 1t to attract its armature 5 and thereby open switch 21. This, of course, again deenergizes the magnet. However, as above set forth, when the armature 5 is attracted and the magnet 1 deenergized, the armature 4 is released, thereby allowing the switch 20 to return to closed position, thus permittlng subsequent energization of the magnet by return of the control switch 23 to engagement with contact 25.

The foregoing control means has many obvious advantages. For example, assuming that the control switch 23 be of an automatic type, as, for example, a thermostat or a pressure switch, it'will be observed that said control means insures against successive responses of the magnet except upon full movements of the switch 23 from one of its contacts to the other.

As above. set forth, the magnet may be advantageously employed in various other relations than that illustrated, and of course, the magnet may be modified in various res ects without departing from the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. In combination, a single electromagnetic winding having a plurality of control circuits, a movable member continuously biased toward a given position and operable against its bias by said winding, means for alternately locking said member in a predetermined position and releasing the same therefrom, upon successive responses of said winding and means for deenergizing said winding upon both locking and release of said member, said means necessitating closure of different circuits to lock and release said member.

2. In combination, a single electromagnetic winding having a plurality of control circuits, a movable member continuously biased toward one position and movable to another position by said'winding, means for alternately locking said member in its last mentioned position and releasing the same therefrom upon successive responses of said winding and means for deenergizin said winding after each response thereo said means necessitating alternate closure of said circuits to lock and release said member.

3. In combination, an electromagnetic winding having a pluralit of control circuits, a plurality of movable members operated thereby, means for selectively locking said members in their attracted positions upon successive responses of said winding, said means releasing each of said members upon locking of the other and means necessitating selection of said control circuits to effect successive responses of said winding.

4. In combination, an electromagnetic winding, a plurality of members biased toward one position and movable to another position by said winding and means for selectively locking said members in their attracted positions upon successive responses of said winding, said means releasing each of said members upon locking the other.

5. In combination, an electromagnetic winding having a plurality of control circuits, a plurality of members biased toward one position and movable to another osition by said winding, means for selective y locking said members against biased movement upon successive responses of said winding, said means releasing each of said members upon locking the other and means necessitating closure of said circuits in a definite order to effect successive responses of said winding.

6. In combination, an electromagnetic winding having two control circuits, two members each biased toward one position and movable to another position by sad winding, means for alternately locln'ng said members in said latter positions upon successive responses of said winding, said means releasing each of said members upon locking the other and means necessitating alternate closure of said control circuits to efi'ect successive responses of said winding.

7. In combination, an electromagnetic winding, two movable armature members therefor, and means for alternately locking said members in attracted positions upon successive responses of said winding and re leasing each of said members upon locking the other.

-8. in combination, winding, two movable armature members therefor, and a latching device associated with each of said members to latch the same in attracted position, said devices having cooperating parts for trifpping one another in given relations thereo 9. In combination, an electromagnetic winding, two movable members therefor and a latching device for each of said members adapted to lock the same in attracted position, said latching devices having cooperat ing parts to trip one another alternately upon successive responses of said Winding.

10. In combination, a plurality of movable members, means associated with each of said members to lock the same in a certain position and to control the locking means of the other member for selective locking of said an electromagnetic members and a single velectro-responsive winding for actuating said members.

11. in combination, a plurality of movable members each having means for looking it in a certain position and tripping the other of said members, and a single electro-responsive winding for effecting operation of said members.

12. In combination, a plurality of switches an electromagnetic winding, two armature members therefor, each operatively connected to one of said switches and a latch for each of said members, said latches looking their respective members in attracted position and cooperating to alternately trip one another upon successive responses of said winding.

In witness whereof, I have hereunto subscribed my name in the presence of two witnesses.

CLARENCE T. EVANS. Witnesses F. H. HUBBARD, S- F. WATSON. 

